164340425 has 6 divisors (see below), whose sum is σ = 203782158. Its totient is φ = 131472320.

The previous prime is 164340403. The next prime is 164340457. The reversal of 164340425 is 524043461.

164340425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 28174864 + 136165561 = 5308^2 + 11669^2 .

It is not a de Polignac number, because 164340425 - 2¹² = 164336329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3286784 + ... + 3286833.

It is an arithmetic number, because the mean of its divisors is an integer number (33963693).

Almost surely, 2^164340425 is an apocalyptic number.

It is an amenable number.

164340425 is a deficient number, since it is larger than the sum of its proper divisors (39441733).

164340425 is an equidigital number, since it uses as much as digits as its factorization.

164340425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573627 (or 6573622 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 164340425 is about 12819.5329478105. The cubic root of 164340425 is about 547.7488426309.

Adding to 164340425 its reverse (524043461), we get a palindrome (688383886).

The spelling of 164340425 in words is "one hundred sixty-four million, three hundred forty thousand, four hundred twenty-five".